Spray nozzle



March 19, 1929. J J. PREBLE 1,705,679

SPRAY NOZZLE Filed May 21, 1926 '2 Sheets-Shem 1 March 19, 1929. J. J.PREBLE 1,705,679.

' SPRAY NOZZLE Filed May 21, 1926 2 Sheets-Sheet 2 ]5\ I M11 F19.

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Application filed. m 21',

The present invention relates to spray nozg AC the nozzle in adirectionnormal to the direction the water takes an passing out oi thenozzle. 'During its passagethrough the nozcentritugal or whirlingaction. discharged from spraynozzles ofthe hollow cone type heretoforeproposed lop-sided, that is, the spray is heavier on one part of thecone than on another part; Thisproves conclusively that such spraynozzlesdo not pro-. clues that uniform distribution ofthe spraynecessary to obtain the maximum cool'ingeijli: ciency. l have determinedthat the lop-sided n l a spray obtained in the spray nozzles of the 1hollow inverted cone type heretofore proposed" is due to the. factthatall the water which is subjected to a centri; al or whirl? ing;action in the nozzle collides atabout the end oi? its first whirl withall the water in' the stream entering the nozzle.- Theobject of thepresent invention is to produce a spray nozzle of the inverted hollowconetype by which a uniform distribution of the drops otspray throughoutthe area of the inverted hollow cone may be obtained.

To the accomplishment of this object, a tea-J ture of the presentinvention contemplates the provision, in a spray nozzle having anoutlet, an intake throi which the liquid enters the nozzle in adirection normal to the direction which the liquid takes in passing outthrough the outlet; and means or subjecting all tire entering liquid toa centrifugal or whirling action, of means for elevating the enteringliquidbetore and during its first whirl above the lowest level of theentering liquid. 3

Broadly considered the whirling liquid may be elevated duringitsfirstwhirl above the lowest level of the cute *ing liquid in anymanner found desirable or expedient as any elevation of the whirlingliquid improves the water enters.

weeserm No. mason. I

spray overthat of thehollow inverted'cone type of spray nozzlesheretofore proposed. I prefer, however, to elevate the whirling liquidat about the end'of its first whirl somewhat above. the vmean level ofthe stream of entering liquid as I then obtain just the proper mixturebetween the whirling liquid and the entering liquid to produce a uniformdistribution of the spray drops'throughout the area of the hollowinverted cone.

In addition to the features of the inven tron above referred to otherfeatures of the invention consist in certain devices, combinations andarrangements of parts astully set .t() rt'l hereinafter, the advantagesof which zle all the entering water is Stlbji-BCtCQl-tO a will bereadily understood by those skilled in Thespray the art.

tion will be, readily understood. from an inspection of the accompanyingdrawings illustrating the best form ofthe lnvention at present' known tothe inventor, in which,

' i Figure 1 is an elevation of the spraynozzle;

. '2 is acentral sectional'elevation;

3 is a sectional-plan, and

Fig. l is a right side sectional elevation on tl.e line 4.' l,Fig'. 1. ii "Referring to the drawings the spray nozzlecomprises hollowcylindrical shell 5 having ZLIOOIQ 6 and afioor 7." The roof 6 isprovided withfanaperture or'outlet' 8 through which the liquidintroduced into the shell 5 is discharged. In one wall of the shelladiacent the floor? a gap 9 (Fig. 3) is formed throusz'h which theliquidto'fbe discharged enters the shellboth in a (llIGCUlOIl IlOIHliLltO thedirec- "tion the liquid takes in passing'out of the shell through theoutlet 8 and in a direction substantially tangential to the peripheryotthe shell so that all the enterinp liquid s sub- Y jected by the shellto a centrirugal or whirling action.

On one side of the gap 9 the shell 5 isprovided with a wall 10 (Fig.which extends laterally from the shell in a direction substantiallytangential to the periphery of the shell. On the other side of the gap 9the shell 5 is provided with a wall 11 (Figs. 1, 3

i and 4) which is extended laterally away from the shell on a curvereverse to thatof the shell. The walls 10 and 11 merge above and belowthe gap 9 to form a hollow cylindrical boss forming an intake 12 havinginternal threads 13 therein to facilitate connection of the spray nozzleto a distributing pipe (not shown).

Part of the liquid entering the intake 12 is diverted by the wall 11towards thewall 10. The rest ot the liquid, and that portion of theliquid diverted towards the wall 10 by the wall 11, is conducted by thewall 10 into the shell 5 through thegap 9 both in a direction normal tothe direction the liquid takes in passing out oi the shell through theoutlet 8 and in a direction tangential to the periphery of the shell 5.The entering liquid thus is subjected by the cylindrical Wall of theshell 5 to a centrifugal or whirling action. 7

The floor 7 of the shell is provided with a channel 14 (Fig. 2) of widthsubstantially halt the width out the minor axis of the shell 5. One endof the channel terminates at the threads 13 of the intake (Fig. Theother end of the channel terminates at an elevated. shell 15 (Figs. 1, 3and 4t) near the juncture of the wall 11 with the shell 5. Between itsterminals the channel formed as a ramp 16 so that the whirling liquidlows around the periphery of the shell on its first whirl all thewhirling liquid is elevated by the ramp 16 towards the'outlet 8 thearrow o'lf,

Fig. l). Rising centrally from the floor 7' in the major axis of theshell is a post 1'? around which the wl'iirling liquid flows on itsfirst whirl. i

As shown in Fi 1 the height of the shell 15 is just above the mean levelof the entering liquid. l l ith this con uction the lower portion onlyof the wlnirling liquid atahout the end of its first whirl coll with theupper portion only of the entering liquid. 1

find that'with his arrang gement the correct amounts of whirling liquidand entering liquid are mixed to produce a spray the drops of which areuniformly distributed over the area of the spray discharged through theoutet 8 in a hollow inverted cone. In addition. to its beneficialfunction of lifting the whirling liquid above the mean level of theentering liquid. the ramp also initiates the upward spiral movement ofthe whirling liquid towards the outlet 8.

shell in a direction normal to the direction the liquid takes in passingthrough the outlet, means to sul 1ect all the entering liquid to acentrifugal or whirlingaction, and means for elevating all the whirlingliquid during its first whirl above the mean level of the enteringliquid including a floor on one end face of the shell having terminalson different levels connected by a ramp, the level of one of theterminals being intermediate the mean and highest level of the enteringliquid.

2. A spray nozzle having, in combination,

a shell. or casing having an outlet and an in 7 take through which theliquid enters the shell in a direction normal to the direction theliquid takes in passing through the outlet, means to subject all theentering liquid to a centri'higal or whirling action, and meansior eevating the lower portion of the whirling 1 uid to a level at about theend oi its first liquid and below the highest level of the enteringliquid.

A spray nozzle having, in combination,

a shell or casing having an outlet and an intake through which theliquid enters the shell whirl above the mean level oi the entering in adirection normal to the direction the liquid takes in passing throughthe outlet,

means to subject all the entering liquidto a centrifugal or whirlingaction, and means for colliding the lower portion only orthe whirlingliquid at about the end of its first whirl with the upper portion onlyof the entering liquid.

In testimony whereof I have signed my name to this specification.

JAMES JARVIS PEBBLE.

